Advancements in Hormone Receptor-Positive Metastatic Breast Cancer - Episode 6

Real-World Experience: The Efficacy and Tolerability of Oral Elacestrant for Patients with ESR1 Mutations

May 15, 2025
Virginia Kaklamani, MD, DSc

,
Megan Kruse, MD

Panelists discuss how real-world studies have shown improved outcomes with elacestrant compared with the original EMERALD trial data, demonstrating that proper patient selection leads to better treatment responses.

Clinical Brief: Real-World Evidence Supporting Elacestrant Use

Main Discussion Topics:

  • Real-world outcomes exceeding clinical trial results (unusual finding)
  • GUARDIAN database analysis: 6.4 months median time to treatment failure
  • Komoda database: 6.8 months progression-free survival (9.4 months if fulvestrant-naive)
  • Expert clinical experience aligning with real-world data
  • Importance of appropriate patient selection for optimal outcomes

Key Points for Physicians:

  • Real-world PFS (6.4-6.8 months) exceeds EMERALD trial results (3.8 months)
  • Fulvestrant-naive patients show particularly strong outcomes (9.4 months)
  • Early adopters report better results with refined patient selection
  • Confirms benefit of using elacestrant in second-line for appropriate patients
  • Real-world data validates subgroup findings from EMERALD

The real-world evidence conclusively demonstrates that proper patient selection based on EMERALD subgroup analyses results in significantly improved clinical outcomes compared with the overall trial population.